Catch closing the app on Android
On Android, when the user uses the back button (effectively trying to close the app), catch this properly and first go back one page. Only if we are at the top, let the app close.
Closes #549 (closed)
On Android, when the user uses the back button (effectively trying to close the app), catch this properly and first go back one page. Only if we are at the top, let the app close.
Closes #549 (closed)